/Engine/Source/Runtime/Engine/Classes/Components/SplineMeshComponent.h
Structure that holds info about spline, passed to renderer to deformUStaticMesh. Also used by Lightmass, so be sure to update Lightmass::FSplineMeshParams and the static lighting code if this changes!
struct FSplineMeshParams
FVector2D
EndOffset
Ending offset of the mesh from the spline, in component space.
FVector
EndPos
End location of spline, in component space.
float
EndRoll
Roll around spline applied at end, in radians.
FVector2D
EndScale
X and Y scale applied to mesh at end of spline.
FVector
EndTangent
End tangent of spline, in component space.
FVector2D
StartOffset
Starting offset of the mesh from the spline, in component space.
FVector
StartPos
Start location of spline, in component space.
float
StartRoll
Roll around spline applied at start, in radians.
FVector2D
StartScale
X and Y scale applied to mesh at start of spline.
FVector
StartTangent
Start tangent of spline, in component space.